Get only numbers from NSString

simplepastiefile.m

+(NSString*)getOnlyNumbersFromString:(NSString*)stringToStrip{
    NSMutableString *strippedString = [NSMutableString 
                                       stringWithCapacity:stringToStrip.length];
    
    NSScanner *scanner = [NSScanner scannerWithString:stringToStrip];
    NSCharacterSet *numbers = [NSCharacterSet 
                               characterSetWithCharactersInString:@"0123456789"];
    
    while ([scanner isAtEnd] == NO) {
        NSString *buffer;
        if ([scanner scanCharactersFromSet:numbers intoString:&buffer]) {
            [strippedString appendString:buffer];
            
        } else {
            [scanner setScanLocation:([scanner scanLocation] + 1)];
        }
    }
    
    return strippedString;
}

cool :)